HIGH-QUALITY RUBBER - Helps protect hardwood and laminate floors from scratches and dents. These wedges are made of quality certified rubber. STRONGER - They have an extra baseboard around them to make them even more unlikely to flip or move if a strong wind blows through your home. NON-SLIP BASE HOLDS - And also provides ultimate gripping power. With their unique hollow design, they wedge doors like no other. MULTI-SURFACE DOOR STOP - Whether it's tile, concrete, or hardwood floors, these door wedges will keep your door from moving. < p>VALUE PACK - These are best suited for institutional and office use, although they can also work well at home.